Multiple arterial revascularization in CABG surgery – investigation of long-term beneﬁ t in a cohort of 3129 consecutive patients - O. Chevtchik; H. Ulmer; A. Sakic; J. Kilo; H. Alber; M. Grimm; E. Ruttmann (Proceedings of the Shevchenko Scientific Society. Medical sciences, 2015)